Create and send responsive HTML emails

ResponsiveEmail is an online service to create and send responsive HTML emails.
Use the simple drag-and-drop editor and easy to use API. comes in two flavours

The online service can be used via a simple drag-and-drop editor or with an easy to use API.

  • Drag-and-drop editor

Using the drag-and-drop editor

Besides the API, which is a tool for programmers, ResponsiveEmail also comes with an easy-to-use web interface for human beings and marketers. You can create emails with our drag-and-drop editor.

Try the editor

Rest API can be accessed with your SMTPeter login credentials. Log in


The API accepts JSON object as input, and delivers HTML code optimized for email. Inside the JSON document you can specify literally everything: sender and recipient(s), subject line, the text and HTML version of the email, attachments and much more. Every property you can set is well documented and can be found in the JSON documentation.

Go to the JSON documentation

                            "name": "My template",
                            "subject": "Example email",
                            "text": "Text version",
                            "background": {
                                "color": "white"

                            "content": {
                                "blocks": [{
                                    "type": "html",
                                    "content": "<p>Example content</p>"

Try it yourself!

To give you an idea how it works, just fiddle with the following JSON and preview your changes as either a rendered preview of the email, prettified, raw or MIME.



  • Rendered
  • Prettified
  • Raw HTML
  • MIME
  • desktop
  • mobile

Example responsive email Templates

View, edit or download beautiful templates that we have already created for you.


Why ResponsiveEmail API?

ResponsiveEmail is here to help and saves you time, money and headaches.

Responsive Email

Responsive emails

The API accepts JSON objects as input, and turns these objects into responsive emails.

Responsive Email

Easy to integrate

Works with any programming language, as long as it produces valid JSON objects and sends it to the API.

Responsive Email

Support for popular email clients

Emails generated with the API render perfectly on popular email clients such as Outlook, Gmail and more.

Send responsive emails on-premise or via cloud?

Instead of generating responsive emails and sending them yourself, choose for a solution where everything has been taken care for you.

ResponsiveEmail On-premise

MailerQ may be a better choice if you want to manage the server yourself. MailerQ has a ResponsiveEmail plugin which can turn JSON input into responsive emails.

MailerQ & ResponsiveEmail

ResponsiveEmail via cloud SMTP

SMTPeter is a cloud-based SMTP service for fast and secure email delivery. Instead of directly sending your email to the recipient, it gets relayed through SMTPeter.

SMTPeter & ResponsiveEmail